GLACIERS OF HARRIMAN FIORD AND PORT WELLS
sides were continually rolling down at the time of our visit, because the ice contact slopes of the lateral moraines were too steep for equilibrium after the supporting glacier margin had been removed by melting.
Serpentine Glacier—The Glacier. The Serpentine Glacier (Fig. 45), which descends from the snowfields and cirques (PL CXXALLl) on the slopes of Mounts Gilbert and
FlQ. 45. MAH OF LOWER END OF SEEPBNTHO1 GlACIHB IN 1010.
Showing moraines, outwash gravels and barren zone. Soundings in feet.
Muir, is about 7J miles long and £ of a mile wide in its mountain valley. At the terminus the width is nearly a mile; and the western half, which ends on the land, projects a half mile farther south than the eastern half, which terminates in a cove of Harriman Fiord. The tidal portion of the glacier terminates in an ice cliff (PL CXXXIII) about 2000 feet in length and 200 feet in height, rising out of shallow water a mile from Harriman Fiord. A few small icebergs were discharged, mostly by cascading down the terminus. A rock ledge is exposed beneath the eastern margin.